The driver can be used directly as device via fd and ioctl (see avalible ioctl`s in parallel_driver.h) and as a simple example its our Parallel port printer transport addon, now it seems working( I tested it on vmware on PC wchich have an physical parallel port, and transport addon detected it, so pity what dont have any device for testing). Stephan, Im fully agree with you what code have style violations and not documented, I will be working on it, and hope someone too, but now I provided that driver "as is" for more people can use and test it. P.S.Scottmc asked about serial driver, thinking about looking at it...